3546 極低炭素薄鋼板におけるベーキング硬化の影響(S12-2 環境効果および薄板材,S12 先進性金属材料の疲労特性と組織)

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  • 3546 Effects of bake hardening on thin sheet of ultra low carbon steel (ULCS)

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Bake hardening steels benefit initially from a relatively low dislocation density and a controlled level of carbon and nitrogen in solution. This research has been carried out to study the effects of the mechanisms of strain ageing particularly on the mechanical properties of a very thin steel sheet. The material used for the present investigation is a 0.4mm thickness of ULCS with addition of titanium to stabilize interstitial carbon. The studied specimens include as-rolled, no pre-strain with bake hardening, pre-strain with and without bake hardening prior to tensile and fatigue tests. The specimens are treated in such a way in order to study the results with baseline microstructure, effect of pre-strain with and without bake hardening and to maximize C in solution with pre-strain and bake hardening process respectively.

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